Arenesulfonic acid functionalized mesoporous silica as a novel acid catalyst for the liquid phase Beckmann rearrangement of cyclohexanone oxime to ε-caprolactam

被引：79

作者：

Wang, XG ^{[1
]}

Chen, CC ^{[1
]}

Chen, SY ^{[1
]}

Mou, Y ^{[1
]}

Cheng, SF ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

来源：

APPLIED CATALYSIS A-GENERAL | 2005年 / 281卷 / 1-2期

关键词：

Beckmann rearrangement; cyclohexanone oxime; epsilon-caprolactarn; SBA-15; arenesulfonic acid;

D O I：

10.1016/j.apcata.2004.11.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Beckmann rearrangement of cyclohexanone oxime to P.-caprolactam was performed in liquid phase for the first time on arenesulfonic acid-functionalized SBA-15 (SBA-ar-SO3H) mesoporous silica with different loadings of the acid. The catalysts were prepared via co-condensation of 2-(4-chlorosulfonylphenyl)ethyltrimethoxysilane (CSPTMS) and tetraethyl orthosilicate (TEOS) in the presence of Pluronic 123 (EO20PO70EO20) and characterized by XRD, N-2 adsorption-desorption, TGA, EA and acid-base titration method. The oxime conversion and selectivity to P.-caprolactam were found to increase with the loading of arene-SO3H groups. The influences of solvent and reaction temperature on the rearrangement of oxime in the liquid phase were examined. The oxime rearrangement and hydrolysis were proposed to be catalyzed on different active sites of -SO3H and Si-OH, respectively. The catalytic activity of SBA-ar-SO3H was also compared with the activities of other solid acid catalysts such as propylenesulfonic acid-functionalized SBA-15, H-ZSM-5, H-mordernite, Al-MCM-41 and Al-SBA-15. The results revealed that SBA-ar-SO3H has higher catalytic activity and lactam selectivity. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：47 / 54

页数：8

共 43 条

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